JPH05244583A - Moving picture coding control system and moving picture coder - Google Patents
Moving picture coding control system and moving picture coderInfo
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- JPH05244583A JPH05244583A JP3983892A JP3983892A JPH05244583A JP H05244583 A JPH05244583 A JP H05244583A JP 3983892 A JP3983892 A JP 3983892A JP 3983892 A JP3983892 A JP 3983892A JP H05244583 A JPH05244583 A JP H05244583A
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- quantization characteristic
- generated code
- quantization
- moving picture
- quantizer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
- H04N19/192—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding the adaptation method, adaptation tool or adaptation type being iterative or recursive
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
- H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
- H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
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- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Image Processing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、動画像符号化の制御方
式と動画像符号化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving picture coding control system and a moving picture coding apparatus.
【０００２】[0002]
【従来の技術】従来の動画像符号化制御方式としては、
例えば１９９０年電子情報通信学会春季全国大会「低ビ
ットレート動画像符号化制御方式の一検討」などが知ら
れている。この符号化制御方式では、図３に示すよう
に、減算器１９と、量子化器２０と、可変長符号化部２
１と、発生符号量算出部２２と、量子化特性選択部２３
と、逆量子化器２４と、加算器２５と、フレームメモリ
２６とから構成され、符号化後に発生符号量算出部２２
で発生符号量を算出し、それが目標発生情報量に近付く
ように、量子化特性選択部２３で量子化特性を選択し量
子化特性を制御している。2. Description of the Related Art As a conventional moving image coding control system,
For example, the 1990 Spring National Convention of the Institute of Electronics, Information and Communication Engineers, "A Study of Low Bit Rate Video Coding Control System" is known. In this coding control method, as shown in FIG. 3, the subtracter 19, the quantizer 20, and the variable length coding unit 2 are used.
1, a generated code amount calculation unit 22, and a quantization characteristic selection unit 23
And an inverse quantizer 24, an adder 25, and a frame memory 26.
The generated code amount is calculated in step S1, and the quantization characteristic is selected by the quantization characteristic selector 23 so that it approaches the target generated information amount, and the quantization characteristic is controlled.
【０００３】[0003]
【発明が解決しようとする課題】上述のような符号化制
御方式では、発生符号量が減少したことによって量子化
器２０の特性が急激に細かくなる場合がある。このよう
な場合、フレーム間符号化では前フレームからの画像内
容の変化分だけでなく、前フレームの粗い量子化特性で
符号化できなかった信号成分も有意情報として符号化す
ることになり、多量の符号量が発生する。また、発生符
号量の増加によって量子化特性が粗くなり、符号量は再
び減少し、その発生符号量の減少によって量子化特性が
細かくなり符号量が増加するといったように、本来の画
像の動きとは無関係に発生符号量が増減し、符号化効
率，画質ともに劣化してしまう。In the above-described coding control system, the characteristics of the quantizer 20 may suddenly become fine due to the decrease in the generated code amount. In such a case, in inter-frame coding, not only the amount of change in the image content from the previous frame, but also the signal component that could not be coded due to the coarse quantization characteristic of the previous frame will be coded as significant information. Code amount of is generated. In addition, the quantization characteristic becomes coarse due to the increase in the generated code amount, the code amount decreases again, the quantization characteristic becomes finer due to the decrease in the generated code amount, and the code amount increases. Irrespective of the above, the generated code amount increases or decreases, and both the coding efficiency and the image quality deteriorate.
【０００４】本発明の目的は、このような発生符号量の
減少によって、量子化特性が急激に細かくなることを抑
え、量子化特性の変化による発生符号量の不要な増減が
ない動画像符号化制御方式を提供することにある。It is an object of the present invention to prevent the quantization characteristic from becoming sharply fine due to such a decrease in the generated code amount, and to prevent moving picture coding from unnecessarily increasing or decreasing the generated code amount due to a change in the quantization characteristic. To provide a control method.
【０００５】本発明の他の目的は、動画像符号化制御方
式を実施する動画像符号化装置を提供することにある。Another object of the present invention is to provide a moving picture coding apparatus which implements a moving picture coding control system.
【０００６】[0006]
【課題を解決するための手段】本発明の動画像符号化制
御方式は、フレーム間予測誤差信号を量子化する量子化
器の特性を発生符号量に応じて制御するフレーム間予測
方式の動画像符号化において、発生符号量の減少に伴い
前記量子化器の特性が急激に細かくなるのを抑えること
を特徴とする。A moving picture coding control system of the present invention is a moving picture of an inter-frame prediction system in which characteristics of a quantizer for quantizing an inter-frame prediction error signal are controlled according to a generated code amount. In encoding, it is characterized in that the characteristics of the quantizer are prevented from becoming sharply fine as the generated code amount decreases.
【０００７】本発明の動画像符号化装置は、フレーム間
予測誤差信号を量子化する量子化器を内蔵し、入力動画
像信号をフレーム間予測符号化する符号化器と、前記符
号化器が出力する単位時間当りの符号量より前記量子化
器の次の単位時間での特性の候補値を決定する手段と、
前記量子化特性候補値を観測し、特性が急激に細かくな
るのを抑えながら前記符号化器に次の単位時間での量子
化特性を通知する手段とを備えることを特徴とする。A moving picture coding apparatus according to the present invention has a built-in quantizer for quantizing an inter-frame prediction error signal, and an encoder for inter-frame predictive coding of an input moving picture signal, and the above-mentioned encoder. Means for determining the candidate value of the characteristic at the next unit time of the quantizer from the output code amount per unit time;
Means for observing the quantized characteristic candidate value and notifying the coder of the quantized characteristic in the next unit time while suppressing the characteristic from rapidly becoming fine.
【０００８】[0008]
【作用】フレーム間予測誤差信号を量子化する量子化器
を発生符号量に応じて制御するフレーム間予測方式の動
画像符号化において、発生符号量が急激に減少した場合
も量子化器の特性が急激に細かくならないように制御す
ると、量子化特性が急激に細かくなったために発生す
る、実際の動きには関係のない発生符号量の不要な増減
を防ぐことができる。In the moving picture coding of the inter-frame prediction system in which the quantizer for quantizing the inter-frame prediction error signal is controlled according to the generated code amount, the characteristic of the quantizer is obtained even when the generated code amount sharply decreases. If it is controlled so as not to be sharply fine, it is possible to prevent an unnecessary increase / decrease in the generated code amount unrelated to the actual motion, which is caused by the sharp fineness of the quantization characteristic.
【０００９】本発明においては、量子化特性を急激に細
かくするのではなく、徐々に細かくするように制御する
ことで発生符号量の不要な増減を防ぎ、符号化効率や画
質の劣化を防ぐ。In the present invention, the quantization characteristic is controlled not to be sharply made fine but to be made finer gradually to prevent an unnecessary increase / decrease in the generated code amount and prevent deterioration in coding efficiency and image quality.
【００１０】量子化特性の変化抑圧の一例を図面を用い
て説明する。図４に示すようにフレームｉで量子化特性
をＱA からＱB に急激に変えたいとする。図４において
縦軸は例えば量子化ステップサイズのように量子化特性
の程度を線形的に表し、上に行くほど量子化特性が粗く
なるとする。このとき量子化特性を細かくする限界値を
ｋ×ＱA （０＜ｋ＜１）とし、設定したい現フレームの
量子化特性の希望値がそれより小さい場合にはｋ×ＱA
で置き換えることにすれば量子化特性の急激な変化を抑
圧できる。例えばｋを０．５、前フレームの量子化特性
をＱ（ｉ−１）とし、現フレームの量子化特性の希望値
をAn example of suppressing the change in the quantization characteristic will be described with reference to the drawings. Suppose that the quantization characteristic is rapidly changed from Q A to Q B in frame i as shown in FIG. In FIG. 4, the vertical axis represents the degree of the quantization characteristic such as the quantization step size linearly, and the quantization characteristic becomes coarser as it goes upward. At this time, k × Q A (0 <k <1) is set as a limit value for making the quantization characteristic fine, and when the desired value of the quantization characteristic of the current frame to be set is smaller than that, k × Q A
By replacing with, it is possible to suppress a sudden change in the quantization characteristic. For example, k is 0.5, the quantization characteristic of the previous frame is Q (i-1), and the desired value of the quantization characteristic of the current frame is
【００１１】[0011]
【数１】 [Equation 1]
【００１２】の場合は現フレームの実際の量子化特性Ｑ
（ｉ）は０．５×Ｑ（ｉ−１）としIn the case of, the actual quantization characteristic Q of the current frame
(I) is 0.5 × Q (i-1)
【００１３】[0013]
【数２】 [Equation 2]
【００１４】とすることで、図５に示すように量子化特
性の急激な変化を抑圧できる。By so doing, it is possible to suppress a sudden change in the quantization characteristic as shown in FIG.
【００１５】量子化特性変化の抑圧方法としては、上記
のようなフレーム単位の制御ではなく画面をいくつかに
分割した領域単位に制御してもよく、また、前フレーム
の発生符号量だけでなく数フレーム前までの符号量やフ
レームより細かい単位の符号量を考慮する方法など、上
記以外の方法にも適用できる。As a method of suppressing the change in the quantization characteristic, the control may be performed not for each frame as described above but for each region divided into several parts of the screen. It can be applied to methods other than the above, such as a method of considering the code amount up to several frames before or the code amount of a unit smaller than the frame.
【００１６】[0016]
【実施例】図面を参照しながら本発明の実施例について
説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１７】図１に本発明による動画像符号化装置の一
実施例を示す。動画像信号は入力信号線１を介して入力
される。減算器２では、フレームメモリ１０に蓄えられ
た前フレームのデータと、現フレームのデータの差分を
とる。量子化器３は、減算器２から供給されたフレーム
間予測誤差信号を量子化特性変化抑圧部７によって選択
された現フレームの量子化特性に沿って量子化する。量
子化されたデータは可変長符号化部４と逆量子化器８に
供給される。逆量子化器８は、量子化特性変化抑圧部７
によって選択された現フレームの量子化特性に沿って逆
量子化を行う。加算器９は逆量子化した現フレームのデ
ータと、フレームメモリ１０に格納されている前フレー
ムのデータとを加算してフレームメモリ１０のデータを
更新する。可変長符号化部４では量子化されたフレーム
間予測誤差信号を可変長符号化し、出力信号線１１を介
して符号化信号を外部に出力する。発生情報量算出部５
では、可変長符号化部４で符号化されたあとの発生符号
量を算出する。量子化特性選択部６は、発生符号量をも
とに量子化特性の希望値を選択する。この選択には前記
文献の符号化制御方式を用いることもできる。量子化特
性変化抑圧部７は、量子化特性選択部６で選択された量
子化特性の希望値が、前フレームの量子化特性と比較し
て急激に細かくならないように量子化特性を補正する。
ここで決定された量子化特性に基づいて、量子化器３は
量子化を行う。FIG. 1 shows an embodiment of a moving picture coding apparatus according to the present invention. The moving image signal is input via the input signal line 1. The subtractor 2 takes the difference between the data of the previous frame stored in the frame memory 10 and the data of the current frame. The quantizer 3 quantizes the inter-frame prediction error signal supplied from the subtractor 2 according to the quantization characteristic of the current frame selected by the quantization characteristic change suppressing unit 7. The quantized data is supplied to the variable length coding unit 4 and the inverse quantizer 8. The inverse quantizer 8 includes the quantization characteristic change suppressing unit 7
Inverse quantization is performed according to the quantization characteristics of the current frame selected by. The adder 9 adds the dequantized current frame data and the previous frame data stored in the frame memory 10 to update the data in the frame memory 10. The variable length coding unit 4 performs variable length coding on the quantized inter-frame prediction error signal and outputs the coded signal to the outside via the output signal line 11. Generated information amount calculation unit 5
Then, the generated code amount after being encoded by the variable length encoding unit 4 is calculated. The quantization characteristic selection unit 6 selects a desired value of the quantization characteristic based on the generated code amount. The coding control method of the above-mentioned document can also be used for this selection. The quantization characteristic change suppressing unit 7 corrects the quantization characteristic so that the desired value of the quantization characteristic selected by the quantization characteristic selecting unit 6 does not become sharply fine compared with the quantization characteristic of the previous frame.
The quantizer 3 quantizes based on the quantization characteristic determined here.
【００１８】次に図２を参照して量子化特性変化抑圧部
７について説明する。図２は、量子化特性変化抑圧部７
の一例を示す。信号線１２を介して、前フレームの発生
符号量や量子化特性などのデータにより選択された現フ
レームの量子化特性のNext, the quantization characteristic change suppressing section 7 will be described with reference to FIG. FIG. 2 shows the quantization characteristic change suppressing unit 7
An example is shown. Through the signal line 12, the quantization characteristic of the current frame selected by the data such as the generated code amount and the quantization characteristic of the previous frame is displayed.
【００１９】[0019]
【数３】 [Equation 3]
【００２０】がセレクタ１３と比較器１６に供給され
る。また、遅延部１４を介して供給された前フレームの
量子化特性Ｑ（ｉ−１）も、乗算器１５によってｋ倍
（０＜ｋ＜１）されセレクタ１３と比較器１６に供給さ
れる。比較器１６はIs supplied to the selector 13 and the comparator 16. The quantization characteristic Q (i−1) of the previous frame supplied through the delay unit 14 is also multiplied by k (0 <k <1) by the multiplier 15 and supplied to the selector 13 and the comparator 16. The comparator 16
【００２１】[0021]
【数４】 [Equation 4]
【００２２】を比較し、その情報をもとにセレクタ１３
はThe selectors 13 are compared with each other based on the information.
Is
【００２３】[0023]
【数５】 [Equation 5]
【００２４】のうち大きい方を現フレームの量子化特性
として選択し、信号線１７を介して符号化部へ供給す
る。The larger one is selected as the quantization characteristic of the current frame and is supplied to the encoding unit via the signal line 17.
【００２５】ＣＣＩＴＴ勧告Ｈ．２６１のハイブリッド
符号化方式のように、動き補償フレーム間予測誤差信号
を量子化する場合にも本発明は適用できる。CCITT Recommendation H.264 The present invention can also be applied to the case of quantizing a motion compensation inter-frame prediction error signal as in the H.261 hybrid coding method.
【００２６】[0026]
【発明の効果】以上に詳しく説明したように、本発明の
動画像符号化制御方式および動画像符号化装置によれ
ば、発生符号量の減少に伴う量子化特性の急激な変化を
抑えることによって、発生符号量の不要な増減を防ぎ、
画質を改善することができる。As described above in detail, according to the moving picture coding control system and the moving picture coding apparatus of the present invention, it is possible to suppress the abrupt change of the quantization characteristic due to the decrease of the generated code amount. , To prevent unnecessary increase / decrease in generated code amount,
The image quality can be improved.
【図１】本発明の動画像符号化制御方式を実施する動画
像符号化装置の一実施例を説明する図である。FIG. 1 is a diagram for explaining an embodiment of a moving picture coding apparatus for carrying out a moving picture coding control system of the present invention.
【図２】量子化特性変化抑圧部の一例を説明する図であ
る。FIG. 2 is a diagram illustrating an example of a quantization characteristic change suppressing unit.
【図３】従来の動画像符号化制御方式を実施する動画像
符号化装置を説明する図である。FIG. 3 is a diagram illustrating a moving picture coding apparatus that implements a conventional moving picture coding control method.
【図４】量子化特性の急激な変化を示す図である。FIG. 4 is a diagram showing abrupt changes in quantization characteristics.
【図５】量子化特性の急激な変化を抑制した後の量子化
特性の変化を示す図である。FIG. 5 is a diagram showing a change in the quantization characteristic after suppressing a rapid change in the quantization characteristic.
１ 入力信号線 ２ 減算器 ３ 量子化器 ４ 可変長符号化部 ５ 発生符号量算出部 ６ 量子化特性選択部 ７ 量子化特性変化抑圧部 ８ 逆量子化器 ９ 加算器 １０ フレームメモリ １１ 出力信号線 １２ 信号線 １３ セレクタ １４ 遅延部 １５ 乗算器 １６ 比較器 １７ 信号線 １８ 入力信号線 １９ 減算器 ２０ 量子化器 ２１ 可変長符号化部 ２２ 発生符号量算出部 ２３ 量子化特性選択部 ２４ 逆量子化器 ２５ 加算器 ２６ フレームメモリ ２７ 出力信号線 1 Input Signal Line 2 Subtractor 3 Quantizer 4 Variable Length Coding Section 5 Generated Code Amount Calculation Section 6 Quantization Characteristic Selection Section 7 Quantization Characteristic Change Suppression Section 8 Inverse Quantizer 9 Adder 10 Frame Memory 11 Output Signal Line 12 Signal line 13 Selector 14 Delay unit 15 Multiplier 16 Comparator 17 Signal line 18 Input signal line 19 Subtractor 20 Quantizer 21 Variable length coding unit 22 Generated code amount calculation unit 23 Quantization characteristic selection unit 24 Inverse quantum Converter 25 adder 26 frame memory 27 output signal line
Claims (2)
化器の特性を発生符号量に応じて制御するフレーム間予
測方式の動画像符号化において、発生符号量の減少に伴
い前記量子化器の特性が急激に細かくなるのを抑えるこ
とを特徴とする動画像符号化制御方式。1. In moving picture coding of an inter-frame prediction system for controlling characteristics of a quantizer for quantizing an inter-frame prediction error signal according to a generated code amount, the quantizer is accompanied by a decrease in the generated code amount. A video coding control method characterized in that the characteristics of are prevented from becoming sharply fine.
化器を内蔵し、入力動画像信号をフレーム間予測符号化
する符号化器と、 前記符号化器が出力する単位時間当りの符号量より前記
量子化器の次の単位時間での特性の候補値を決定する手
段と、 前記量子化特性候補値を観測し、特性が急激に細かくな
るのを抑えながら前記符号化器に次の単位時間での量子
化特性を通知する手段とを備えることを特徴とする動画
像符号化装置。2. An encoder that incorporates a quantizer that quantizes an inter-frame prediction error signal and that inter-frame predictively codes an input moving image signal, and a code amount per unit time output by the encoder. Means for determining the candidate value of the characteristic in the next unit time of the quantizer, and observing the quantized characteristic candidate value, the next unit to the encoder while suppressing the characteristics from rapidly becoming fine And a means for notifying the quantization characteristic in time.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3983892A JP2894067B2 (en) | 1992-02-26 | 1992-02-26 | Moving picture coding control method and moving picture coding apparatus |
| CA 2090206 CA2090206C (en) | 1992-02-26 | 1993-02-23 | Encoding apparatus for motion video signals |
| US08/022,315 US5396292A (en) | 1992-02-26 | 1993-02-25 | Encoding apparatus for motion video signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3983892A JP2894067B2 (en) | 1992-02-26 | 1992-02-26 | Moving picture coding control method and moving picture coding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05244583A true JPH05244583A (en) | 1993-09-21 |
| JP2894067B2 JP2894067B2 (en) | 1999-05-24 |
Family
ID=12564109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3983892A Expired - Fee Related JP2894067B2 (en) | 1992-02-26 | 1992-02-26 | Moving picture coding control method and moving picture coding apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5396292A (en) |
| JP (1) | JP2894067B2 (en) |
| CA (1) | CA2090206C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0694245A1 (en) * | 1993-04-16 | 1996-01-31 | Data Translation, Inc. | Adaptive video compression using variable quantization |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2902284B2 (en) * | 1993-11-12 | 1999-06-07 | ケイディディ株式会社 | Video encoding device |
| EP0774869A3 (en) * | 1995-11-16 | 1999-09-29 | Hitachi Denshi Kabushiki Kaisha | Image data coding/decoding system |
| US5889891A (en) * | 1995-11-21 | 1999-03-30 | Regents Of The University Of California | Universal codebook vector quantization with constrained storage |
| DE69629442T2 (en) * | 1995-12-06 | 2004-06-09 | Harman Becker Automotive Systems (Xsys Division) Gmbh | Method and device for coding digital video signals |
| US5872598A (en) * | 1995-12-26 | 1999-02-16 | C-Cube Microsystems | Scene change detection using quantization scale factor rate control |
| US6738423B1 (en) * | 2000-01-21 | 2004-05-18 | Nokia Mobile Phones Ltd. | Method for encoding and decoding video information, a motion compensated video encoder and a corresponding decoder |
| JP4769392B2 (en) * | 2001-09-25 | 2011-09-07 | キヤノン株式会社 | Signal processing device |
| EP2278807B1 (en) * | 2001-11-27 | 2012-07-18 | Samsung Electronics Co., Ltd. | Apparatus for decoding a bitstrom with an orientation interpolator |
| JP4015934B2 (en) | 2002-04-18 | 2007-11-28 | 株式会社東芝 | Video coding method and apparatus |
| FR2878384A1 (en) * | 2004-11-23 | 2006-05-26 | Paul Bazzaz | VIDEO COMPRESSION BY MODIFICATION OF QUANTIFICATION BY ZONES OF IMAGES |
| US7731570B2 (en) | 2005-03-10 | 2010-06-08 | Boaz Barry Groman | Micro-abrasive blasting devices with perturbation control |
| US7607972B2 (en) * | 2006-06-13 | 2009-10-27 | Boaz Barry Groman | Self-contained disposable micro-abrasive blasting tip for dental applications |
| US8529313B2 (en) * | 2006-06-13 | 2013-09-10 | Boaz Barry Groman | Powder blasting device, method and system for dental applications |
| CN104602025B (en) | 2015-01-09 | 2018-11-20 | 华为技术有限公司 | The method and apparatus for handling image |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6285588A (en) * | 1985-10-11 | 1987-04-20 | Nec Corp | System and device for encoding moving picture signal |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832047B2 (en) * | 1989-04-28 | 1996-03-27 | 日本ビクター株式会社 | Predictive coding device |
| US5121202A (en) * | 1989-05-12 | 1992-06-09 | Nec Corporation | Adaptive interframe prediction coded video communications system |
| JP2520306B2 (en) * | 1989-05-24 | 1996-07-31 | 三菱電機株式会社 | Transform coding device |
| JPH0828875B2 (en) * | 1989-08-21 | 1996-03-21 | 三菱電機株式会社 | Encoding device and decoding device |
| US5144426A (en) * | 1989-10-13 | 1992-09-01 | Matsushita Electric Industrial Co., Ltd. | Motion compensated prediction interframe coding system |
| JPH0714209B2 (en) * | 1989-12-20 | 1995-02-15 | 松下電器産業株式会社 | Video coding device |
| US5134475A (en) * | 1990-12-11 | 1992-07-28 | At&T Bell Laboratories | Adaptive leak hdtv encoder |
-
1992
- 1992-02-26 JP JP3983892A patent/JP2894067B2/en not_active Expired - Fee Related
-
1993
- 1993-02-23 CA CA 2090206 patent/CA2090206C/en not_active Expired - Fee Related
- 1993-02-25 US US08/022,315 patent/US5396292A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6285588A (en) * | 1985-10-11 | 1987-04-20 | Nec Corp | System and device for encoding moving picture signal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0694245A1 (en) * | 1993-04-16 | 1996-01-31 | Data Translation, Inc. | Adaptive video compression using variable quantization |
| EP0694245A4 (en) * | 1993-04-16 | 1996-05-08 | Data Translation Inc | Adaptive video compression using variable quantization |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2090206C (en) | 1999-02-16 |
| US5396292A (en) | 1995-03-07 |
| JP2894067B2 (en) | 1999-05-24 |
| CA2090206A1 (en) | 1993-08-27 |
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